| Person | Type | Job | Role(s) |
|---|---|---|---|
 Ben Nye | Crew | Costume & Make-Up | Makeup Artist |
 Charles O'Neal | Crew | Writing | Story |
 Dick Smith | Crew | Costume & Make-Up | Makeup Artist |
Harry Gerstad | Crew | Editing | Editor |
Herbert E. Mendelson | Crew | Directing | Assistant Director, Production Manager |
Irving Gertz | Crew | Sound | Original Music Composer |
Jack Leewood | Crew | Production | Producer |
John B. Mansbridge | Crew | Art | Art Direction |
Joseph Kish | Crew | Art | Set Decoration |
 Karl Struss | Crew | Camera | Director of Photography |
 Lyle R. Wheeler | Crew | Art | Art Direction |
Orven Schanzer | Crew | Editing | First Assistant Editor |
Orville H. Hampton | Crew | Writing | Screenplay, Story |
 Roy Del Ruth | Crew | Directing | Director |
Walter M. Scott | Crew | Art | Set Decoration |
Eve Newing | Crew | Costume & Make-Up | Hairstylist |
Arthur Cornell | Crew | Sound | Sound Effects |
Ollie Hughes | Crew | Costume & Make-Up | Costume Supervisor |
W.D. Flick | Crew | Sound | Sound |
 Beverly Garland | Cast | Actress | Joyce Webster, aka Jane Marvin |
 Boyd Stockman | Cast | Actor | Alligator-headed Paul |
 Bruce Bennett | Cast | Actor | Dr. Eric Lorimer |
 Douglas Kennedy | Cast | Actor | Dr. Wayne McGregor |
 Dudley Dickerson | Cast | Actor | Porter |
 Frieda Inescort | Cast | Actress | Mrs. Lavinia Hawthorne |
 George Macready | Cast | Actor | Dr. Mark Sinclair |
 Hal K. Dawson | Cast | Actor | Conductor |
 John Frederick | Cast | Actor | 1st Male Nurse (uncredited) |
 Lon Chaney Jr. | Cast | Actor | Manon |
 Richard Crane | Cast | Actor | Paul Webster |
 Ruby Goodwin | Cast | Actress | Louann |
Vince Townsend Jr. | Cast | Toby | |
 Bill Bradley | Cast | Patient 'Number Six' (uncredited) | |
Ken Kane | Cast | Third Male Nurse (uncredited) | |
| Person | Type | Job | Role(s) |
